Naturaleza, Historia, Dios. (1942). Collection of essays written up to that time. Represents Zubiri’s early thought and points to his mature work. Many of the essays are remarkably perceptive and still up-to-date.

Sobre la esencia. (1962). First major systematic work by Zubiri. Examines concept of essence in light of entire history of philosophy and developments in modern science.

Cinco lecciones de filosofía. (1963). Five profound and intriguing lectures on major philosophical figures. Zubiri was ever the diligent student of the history of philosophy, and his work is always in dialogue with it.

Inteligencia sentiente. Volume.1: Inteligencia y realidad. (1980). First volume of three part study of intelligence, reality, and metaphysics in the broadest sense, in particular, how our knowledge—modest though it may be—undergirds our knowledge of reality. This, together with the subsequent two volumes, is undoubtedly Zubiri’s most important work, and the one in light of which all of his other works must be understood.

El problema filosófico de la historia de las religiones (1993). Second of three volumes on theological topics. Explores religious thought from historical and philosophical perspective.

Los problemas fundamentales de la metafísica occidental (1994). Thematic exposition of the fundamental metaphysical problems in the Western tradition, with Zubiri’s comments and explanation of them.

El espacio, el tiempo, la materia (1996). Zubiri’s reflection on the problems posed throught the history of philosophy and science by these three important notions.

El problema teologal del hombre: Cristianismo (1997). Third volume of Zubiri's trilogy on theological topics. Contains Zubiri's reflections on the theologal, creation, the Incarnation, access to God in Christ, the Church, and the evolution of dogma.

El hombre y la verdad (1999), edited by Juan A. Nicolás. Detailed discussion of Zubiri’s theory of the levels of truth, from the deepest where error is impossible, to the highest where confirmation is most difficult. Note that Zubiri’s reflections in this book (1966) a slightly earlier than his most mature thought on the subject, in Inteligencia sentiente.

The following books are in preparation by the indicated editors; no date has yet been set for their publication:

1921. Le Problème de l’objectivité d’après Ed. Husserl: I, La Logique pure (The Problem of Objectivity According to E. Husserl: I, Pure Logic). Licentiate thesis (not published) under the direction of professor Noël at the Institut Supérieur de Philosophie, University of Louvain.

1923. Ensayo de una teoría fenomenológica del juicio (Essay Concerning a Phenomenological Theory of Judgement). Doctoral thesis presented in 1921 under the guidance of Ortega y Gasset at the University of Madrid.

1965. El problema filosófico de la historia de las religiones (The philosophical problem of the history of religions), and El problema de Dios en la historia de las religiones (The problem of God in the history of religions).

Naturaleza, Historia, Dios, originally published in 1942 and continuously reprinted since then, was translated by Thomas B. Fowler as Nature, History, God and published in 1982 by University Press of America. It went through two printings but is now out of print, though copies can still be obtained from the Foundation for $22.95 postpaid. This book is a collection of essays from the period 1930-1944, and represents Zubiri’s early thinking, much of it quite profound. The Zubiri Foundation would like to reprint it, after some editing.

Sobre la esencia, originally published in 1962, and translated as On Essence by Robert Caponigri, was published in 1983 by Catholic University Press. This translation is also out of print and unavailable at the present time. The Zubiri Foundation also hopes to reprint this book if funds become available and the copyright can be secured.

Inteligencia sentiente, published 1980-83 has been translated as Sentient Intelligence. It was originally published in three volumes: Inteligencia y realidad (1980), Inteligencia y logos (1982), and Inteligencia y razón (1983). Thomas Fowler undertook the translation of this book at Zubiri’s request, and has completed the translation of all three volumes. They were published in one volume by the Foundation in 1999. This is the last book Zubiri completed before his death in September of 1983. Volume 1: Intelligence and Reality. Volume 2: Intelligence and Logos. Volume 3: Intelligence and Reality.

El hombre y Dios (1984) has been translated by Mr. Joaquin Redondo and is now in the process of being revised. It will be entitled Man and God in English. This is the first of a projected set of three volumes on theological topics. Zubiri died while in the process of preparing this work for publication. It is based on lectures he gave over the course of a number of years. This translation will also be published by the Foundation when it is ready and funds become available.

El problema filosofico de la historia de las religiones (1993), the second volume of the trilogy, is also being translated by Mr. Redondo.

La aventura de curar: La antropologia medica de Pedro Lain Entralgo, by Nelson Orringer of the University of Connecticut, Galaxia Gutembergo/Circulo de Lectores, Barcelona (1997).
Though not in English, this book is by an American scholar, whose work will be of interest in this section. It is the first book published on the
philosophy of medicine of Pedro Lain Entralgo; the author makes considerable use of Zubiri in the process of analyzing Lain Entralgo's work.